OpenAI compatible API · Attested · Public status

Cohere Embed v4.0 vs Z.ai: GLM 5.1

Cohere Embed v4.0 vs Z.ai: GLM 5.1: compare current API pricing, context, provider routes, privacy, p50 latency, and OpenAI-compatible access.

Verify gateway

Onebase URL to migrate

100sof models and routes

0prompt or output logs. Always.

Compare routesProviders, price, context, and policy posture in one view.

Use auto when uptime mattersKeep a primary model and let fallback handle provider failures.

Same API shapeUse the OpenAI client and set the model you want.

Practical read

Monthly evidence

Cohere Embed v4.0 has the lower cheapest prompt+completion route on TrustedRouter. Z.ai: GLM 5.1 has more provider fallback routes, while Z.ai: GLM 5.1 has the larger context window. Probe-backed speed data is shown when enough recent samples exist.

$0.1266/1MCohere Embed v4.0 cheapest route

$4.2833/1MZ.ai: GLM 5.1 cheapest route

not enough dataCohere Embed v4.0 fastest measured p50 TTFT

1310 msZ.ai: GLM 5.1 fastest measured p50 TTFT via telnyx

Prices and live route measurements can change. Use the monthly reports when you need a stable evidence window, then run a small task-specific eval before choosing a production default.

Cohere Embed v4.0Z.ai: GLM 5.1

Model idcohere/embed-v4.0z-ai/glm-5.1

Publisher Cohere Z.AI

AI IQ — IQ 114#43

Context128,000 tokens200,000 tokens

Credits provider routes115

Cheapest route$0.1266/1M$4.2833/1M

Cached inputNot published$0.10339/1M to $0.70263/1M

Privacy posturehas ZDR routehas provider E2EE route

Fastest measured p50 TTFTnot enough data1310 ms via telnyx

Highest measured throughputnot enough datanot enough data

Recent route uptime rangenot enough data0.00% to 100.00%

Modes embeddings chat

Cohere Embed v4.0 routes

Overview1 Credits routes

Z.ai: GLM 5.1 routes

Overview15 Credits routes
PricingInput, cached input, and output rates
BenchmarksTrustedRouter and external sources
ProvidersAll serving providers

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Production choice

Pick a default model. Keep fallback enabled.

TrustedRouter is useful when you know the model you want, but still need provider rollover, budget limits, usage records, and a prompt path you can verify.

OpenAI clientPython

client = OpenAI(
    base_url="https://api.trustedrouter.com/v1",
    api_key="sk-tr-v1-..."
)

response = client.chat.completions.create(
    model="cohere/embed-v4.0",
    messages=messages,
)

Questions

Which should I use, Cohere Embed v4.0 or Z.ai: GLM 5.1?

Is Cohere Embed v4.0 or Z.ai: GLM 5.1 cheaper?

The current cheapest TrustedRouter route is $0.1266/1M for Cohere Embed v4.0 and $4.2833/1M for Z.ai: GLM 5.1. The comparison uses current catalog prices and updates as provider pricing changes.

Is Cohere Embed v4.0 or Z.ai: GLM 5.1 faster?

Current measured p50 time to first token is not enough data for Cohere Embed v4.0 and 1310 ms for Z.ai: GLM 5.1. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test Cohere Embed v4.0 and Z.ai: GLM 5.1 with the same API?

Yes. Use the same OpenAI-compatible TrustedRouter base URL and API key, then change only the model id between cohere/embed-v4.0 and z-ai/glm-5.1. This makes side-by-side evals possible without maintaining two provider integrations.